Corporate America once you are out of it is tough to get back into. Age is a definite factor, In the company I retired from affairs are discreet and if causes disruption then the male generally gets sent to the farthest outpost but we were very conserative.
Gina has some good points and possibly the info from the last job can be a factor.
After discovering Corporate IT generally hires youngsters I actually took a temp job as a beach lifeguard and it has done wonders for esteem building after a MidEast deployment immediately followed by a divorce two years ago.
Have your H take account of his strengths and weaknesses and look in another direction. Trust me life is too short to go back to something that is not fullfilling and a high standard of living is not worth wasting your most precisious resource. Time.
Best Wishes
"All I want is a weeks pay for a day's work" Steve Martin